To edit or not to edit

You know when you positively love something, but it doesn't quite work in your home?

I recently found this darling little pillow at  Crate & Barrel (you can find it here).  

But the turquoise is clashing with my area rug (which has more slate blue gray in it).  The rug will eventually be replaced (with a neutral, less patterned one), so this pillow will eventually fit in.  

But my question is...do you redecorate an entire room around something new, or do you just take it back to the store?

(This is a rhetorical question, of course, as I already know the answer).

I am learning that in order to have an edited, clean decor you really have to reject a lot of "pretty" things you might otherwise love and stick with your game plan.  

Still...this is such a little gem!

I don't know how the great designers edit themselves.  It is a battle for me to stick with a coherent, uncluttered look for my home!